Microbicidal and antiseptic gel composition

Abstract

A microbicidal and antiseptic composition, which comprises the following (a), (b) and (c): (a) at least one kind of alcohols selected from the group consisting of ethanol and isopropanol; (b) at least one kind of carboxyvinyl polymers selected from the group consisting of polyacrylic acids, polyacrylates, copolymers of polyacrylic acids and polyacrylic acid alkyl esters, and copolymers of polyacrylates and polyacrylic acid alkyl esters; and (c) agar.

The invention claimed is: 
     
       1. A microbicidal and antiseptic composition, which comprises the following (a), (b) and (c):
 (a) at least an alcohol selected from the group consisting of ethanol and isopropanol; 
 (b) at least a carboxyvinyl polymer selected from the group consisting of a polyacrylic acid, a polyacrylate, a copolymer of a polyacrylic acid and a polyacrylic acid alkyl ester, and a copolymer of a polyacrylate and a polyacrylic acid alkyl ester; and 
 (c) a low-strength agar having a jelly strength of 10 to 250 g/cm 2  as measured in a gel state at a concentration of 1.5% (w/w), 
 wherein the alcohol content relative to the whole composition is 40 to 95% (v/v), and 
 wherein the agar content relative to the whole composition is 0.01 to 1% (w/v). 
 
     
     
       2. The microbicidal and antiseptic composition according to  claim 1 , wherein the low-strength agar is obtained by cleaving molecules of natural agar by acid treatment, alkali treatment or heat treatment. 
     
     
       3. The microbicidal and antiseptic composition according to  claim 1 , wherein the carboxyvinyl polymer content relative to the whole composition is 0.01 to 4% (w/v). 
     
     
       4. The microbicidal and antiseptic composition according to  claim 1 , which further comprises at least one member selected from the group consisting of cellulose and a cellulose derivative. 
     
     
       5. The microbicidal and antiseptic composition according to  claim 1 , which further comprises at least one member selected from the group consisting of higher aliphatic alcohols having 12 to 22 carbon atoms. 
     
     
       6. A microbicidal and antiseptic method, which comprises applying the composition according to  claim 1  to a hand. 
     
     
       7. The microbicidal and antiseptic composition according to  claim 1 , which further comprises hydroxypropyl cellulose. 
     
     
       8. The microbicidal and antiseptic composition according to  claim 1 , which further comprises an alkanolamine. 
     
     
       9. The microbicidal and antiseptic composition according to  claim 8 , wherein the alkanolamine is diisopropanolamine. 
     
     
       10. The microbicidal and antiseptic composition according to  claim 1 , which further comprises hydroxypropyl cellulose and diisopropanolamine. 
     
     
       11. A microbicidal and antiseptic composition, which comprises the following (d), (e), (f), (g), (h) and (i):
 (d) ethanol at a concentration of 78.9%(v/v), 
 (e) carboxyvinyl polymer, 
 (f) hydroxypropyl cellulose at a concentration of 0.05%(w/v), 
 (g) low-strength agar having a jelly strength of 10 to 250 g/cm 2  as measured in a gel state at a concentration of 1.5% (w/w), 
 (h) diisopropanolamine, and 
 (i) water. 
 
     
     
       12. A method for sterilizing or disinfecting a hand, which comprises:
 a step of applying a composition to the hand, and 
 a step of rubbing the composition into the hand to sterilize or disinfect the hand, 
 wherein the composition comprises the following (a), (b) and (c): 
 (a) at least an alcohol selected from the group consisting of ethanol and isopropanol; 
 (b) at least a carboxyvinyl polymer selected from the group consisting of a polyacrylic acid, a polyacrylate, a copolymer of a polyacrylic acid and a polyacrylic acid alkyl ester, and a copolymer of a polyacrylate and a polyacrylic acid alkyl ester; and 
 (c) a low-strength agar having a jelly strength of 10 to 250 g/cm 2  as measured in a gel state at a concentration of 1.5% (w/w), 
 wherein the alcohol content relative to the whole composition of the composition is 40 to 95% (v/v), and 
 wherein the agar content relative to the whole composition of the composition is 0.01 to 1% (w/v). 
 
     
     
       13. The method for sterilizing or disinfecting a hand according to  claim 12 , wherein 0.5 to 3 mL of the composition is applied to the hand at a time. 
     
     
       14. A method for providing smoothness and resistance to dripping to a microbicidal and antiseptic composition, comprising
 adding a low-strength agar having a jelly strength of 10 to 250 g/cm 2  as measured in a gel state at a concentration of 1.5% (w/w) to a first microbicidal and antiseptic composition to obtain a second microbicidal and antiseptic composition having smoothness and resistance to dripping, 
 wherein the first microbicidal and antiseptic composition comprises the following (a) and (b): 
 (a) at least an alcohol selected from the group consisting of ethanol and isopropanol; and 
 (b) at least a carboxyvinyl polymer selected from the group consisting of a polyacrylic acid, a polyacrylate, a copolymer of a polyacrylic acid and a polyacrylic acid alkyl ester, and a copolymer of a polyacrylate and a polyacrylic acid alkyl ester, 
 wherein the alcohol content of the second microbicidal and antiseptic composition is 40 to 95% (v/v),  and 
 wherein the agar content of the second microbicidal and antiseptic composition is 0.01 to 1% (w/v).